= Tripeptide
A <tripeptide> contains three <amino acid residues> linked by <peptide bonds>. Even three residues have an order: Gly-Ala-Ser and Ser-Ala-Gly have the same residue composition but different sequences and terminal environments. Short length does not imply biological inactivity, since small <peptides> can participate in signalling or chemical protection. Covalent modifications and nonstandard linkages require specification beyond the simple residue count. <Nomenclature and Symbolism for Amino Acids and Peptides (Recommendations 1983) by IUPAC-IUB Joint Commission on Biochemical Nomenclature>[peptide terminology and residue sequence notation]{ref}
Back to article page
